CVE-2026-95391: Wireshark ZigBee ZCL protocol dissector crash

CVE-2026-95391 · Severity: medium · CVSS 5.5 · Published 2026-09-29

Wireshark is a network traffic analysis tool used by security professionals to inspect and troubleshoot network communications. A use-after-free vulnerability in the ZigBee ZCL protocol dissector can cause Wireshark to crash when processing specially crafted network packets or trace files. An attacker could exploit this to disable network analysis capabilities or cause unexpected application termination.

Technologies: Wireshark Foundation Wireshark. Vendors: Wireshark Foundation.

Quick answers

Is CVE-2026-95391 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-95391 being exploited in the wild.
How severe is CVE-2026-95391?
Medium severity, with a CVSS score of 5.5, published 29 September 2026.
Which products and versions are affected?
Wireshark Foundation Wireshark 4.6.0 to 4.6.8.
Is there a fix for CVE-2026-95391?
A patch was published on 2026-09-29. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-95391 attacked?
It is attacked over the network or with local access, in a network appliance.
Am I affected by CVE-2026-95391?
Check whether you run Wireshark Foundation Wireshark at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free vulnerability exists in the ZigBee ZCL Touchlink commissioning map handler, where allocated memory references are not cleared before a redissection pass, causing access to freed memory and crashing the dissector. The vulnerability is triggered when processing malformed ZigBee ZCL packets or trace files, particularly when file dissection requires a redissect operation (such as when reading PCAP files with out-of-order metadata blocks). No authentication or special privileges are required to trigger the crash via network injection or by convincing a user to open a malicious trace file.

Affected products

  • Wireshark Foundation Wireshark 4.6.0 to 4.6.8

Timeline

  • 2026-09-23: disclosed
  • 2026-09-29: patched

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.